Other breath-activated inhalers are also called dry powder inhalers. These inhalers do derece contain the pressurised inactive gas to propel the medicine. You don't have to push the canister to release a dose. Some topical corticosteroids hayat be bought 'over the counter' without a prescription. For example, for dermatitis, the http://www.drugoffice.gov.hk/gb/unigb/tr.wikipedia.org/wiki/Vitamin